Post brake beam



June 19, 1934.

L. E. ZERBE 1,963,344

POST BRAKE BEAM Filed 1929 2 Sheets-Sheet 1 June 19, 1934. Z RB 1,963,344

POST BRAKE BEAM Filed Jan. 22, 1929 2 Sheets-Sheet 2 Patented June 19, 1934 POST BRAKE BEAM Lewis E. Zerbe, Moneta, Calif., assignor, by mesne assignments, to The National Superior Company, Toledo, Ohio, a corporation of Delaware Application January 22, 1929, Serial No. 334,308

3 Claims.

This invention relates to post brake beams or, in other words, to that portion of a drawworks that is secured to the posts or standards of the k drawworks of a well drilling rig and that operates the brakes.

A very important object of this invention is to eliminate the brake-operating mechanism from in front of the drawworks drum, thus giving a clear space immediately in front of the drum so as to increase the space in which 'the well drillers can move about, thus reducing the hazard of drilling wells.

Heretofore, the brake-operating mechanism of a drawworks has been mounted on the derrick floor independently of the drawworks frame that supports the drum and, accordingly, it has been necessary to properly align the brake-operating mechanism with the brake drums after the drawworks has been placed on the derrick floor. An important object of this invention is to eliminate the necessity of thus having to align the brake operating mechanism with the brake drums and to mount the brake-operating mechanism on a beam that in turn is secured to the posts or standards of the drawworks and, thus, becomes a portion of the frame of said. drawworks.

Other objects and advantages will appear in the subjoined detailed description.

The accompanying drawings illustrate the inventlon.

Figure 1 is a broken rear elevation of a drawworks having a post brake beam constructed in accordance with the provisions of this invention.

Figure 2 is an end elevation from the left of Figure 1.

Figure 3 is an enlarged broken horizontal section approximately on the line indicated by 3-3 of Figure 2.

Figure 4 is an enlarged vertical section on the line indicated by 44, Figure 1.

Referring to the drawings, the drawworks frame is indicated in general at 3, and it includes posts or standards 4 and a horizontally extending beam 5 secured by bolts 6, '7 to U-shaped brackets 8 which, in turn, are secured by rivets 9, or their equivalents, to the rear faces of the posts 4.

Mounted on the front faces of the posts 4 are bearings 10 in which rotates a shaft 11. Mounted on the shaft 11 is the cable drum 12 and, at its opposite ends, the drum 12 is provided with brake drums l3. Surrounding the brake drums 13 are brake bands 14, 15, and the ends of the brake bands are positioned rearwardly of a ver- "cal plane passing through the axis of the shaft 11. In this particular instance, the beam 5 is an I-beam and mounted on the upper flange of the beam are bearings 16 in which is mounted a rock shaft 17.

The rock shaft 17 is provided with a crank sleeve 18a having cars 18 between which is pivoted by a pin 19 the eye 20 of the brake band 14. Rotatably mounted on the shaft 17 is a tubular shaft 21 provided with spaced ears 22 between which is pivoted, by a pin 23, the eye 24 of the brake band 15. The shafts 1'7, 21 are operated by segmental gears 25, 26, respectively, secured to said shafts, and between the segmental gears and in mesh with them is a pinion 27 which is rotatably mounted on an operating member 28.

In this instance, the gear 25 is secured by a key 281 to the shaft 17 while the gear 26 is integral with the shaft 21.

The operating member is rotatably mounted on the shaft 17, between the hubs of the gears 25, 26. This means for equalizing the pressure of the brake bands is not new and is described herein in order to make clear the construction and operation of the invention.

The brake bands are adjustably anchored by the following described construction. On the opposite end of each brake band from that provided with the eye hereinbefore described are spaced eyes 29 through which extends a pin 30. The eye 31 of an eye-bolt 32 engages each pin between the eyes 29, and each of the eyebolts passes through a hole 33 in a filler block 34 and projects beyond said filler block and anchor plate 34a to receive a nut 35. Pivoted at 36 to the anchor plates 34a are jaws 37 which engage the nuts to lock said nuts against turning.

The intermediate or web portions of the U- shaped brackets rest against one side of the web of the I-beam and the filler blocks 34 rest against the opposite side of said web, said web being provided with holes 38 through which the eyebolts 32 pass. The operating member 28 is curved and extends underneath the shaft 11 to the front of the drawworks and is provided with a handle 39. Thus, the operator is stationed in front of the drawworks to operate the member 28.

The shaft 17 is provided with a counter-balance 40 which is connected with said shaft 17 by an arm 41. This counter-balance is positioned to turn the shaft 1'7 in a direction to expand the brake bands.

I claim:

1. In a hoisting apparatus, the combination of a frame including spaced posts, a beam connected with the rear faces of the posts, bearings 2. In a rotary drawworks, the combination of a frame, a structural beam member, U-shaped brackets secured to the structural beam member with the intermediate portions of the brackets engaging one side of the web of the structural beam member, a brake band operating means mounted on the beam member, an anchor plate engaging the other side of the Web of the beam member, a band and adjusting bolt passed through the beam and the anchor plate, a nut on the bolt engaging the anchor plate, and a means on the anchor plate to lock the nut against turning.

3. In a rotary drawworks, the combination of a frame including spaced posts, a structural beam member connected with the rear of the posts, brackets secured to the beam, an anchor plate engaging one face of the beam, a brake band adjusting bolt passing through a hole in the beam and. through the anchor plate, an adjusting nut on the bolt engaging the anchor plate, means on the anchor plate to lock the nut against turning, and a brake band operating means mounted on the beam.

LEWIS E. ZERBE. 

